DOI: 10.1175/JCLI-D-14-00748.1
Scopus记录号: 2-s2.0-84957622973
论文题名: The influence of sea ice dynamics on the climate sensitivity and memory to increased antarctic sea ice
作者: Parise C.K. ; Pezzi L.P. ; Hodges K.I. ; Justino F.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 24 起始页码: 9642
结束页码: 9668
语种: 英语
Scopus关键词: Atmospheric thermodynamics
; Climate models
; Feedback
; Meteorology
; Sea ice
; Sea level
; Annular mode
; Atmosphere-ocean interactions
; Climate sensitivity
; Coupled climate systems
; Ensembles
; Mean sea level pressures
; Southern Annular Mode
; Southern Hemisphere
; Ice
; atmosphere-ice-ocean system
; atmospheric dynamics
; baroclinic motion
; climate modeling
; ice cover
; insulation
; sea ice
; Southern Hemisphere
; Southern Ocean
英文摘要: The study analyzes the sensitivity and memory of the Southern Hemisphere coupled climate system to increased Antarctic sea ice (ASI), taking into account the persistence of the sea ice maxima in the current climate. The mechanisms involved in restoring the climate balance under two sets of experiments, which differ in regard to their sea ice models, are discussed. The experiments are perturbed with extremes of ASI and integrated for 10 yr in a large 30-member ensemble. The results show that an ASI maximum is able to persist for ~4 yr in the current climate, followed by a negative sea ice phase. The sea ice insulating effect during the positive phase reduces heat fluxes south of 60°S, while at the same time these are intensified at the sea ice edge. The increased air stability over the sea ice field strengthens the polar cell while the baroclinicity increases at midlatitudes. The mean sea level pressure is reduced (increased) over high latitudes (midlatitudes), typical of the southern annular mode (SAM) positive phase. The Southern Ocean (SO) becomes colder and fresher as the sea ice melts mainly through sea ice lateral melting, the consequence of which is an increase in the ocean stability by buoyancy and mixing changes. The climate sensitivity is triggered by the sea ice insulating process and the resulting freshwater pulse (fast response), while the climate equilibrium is restored by the heat stored in the SO subsurface layers (long response). It is concluded that the time needed for the ASI anomaly to be dissipated and/or melted is shortened by the sea ice dynamical processes. © 2015 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50813
Appears in Collections: 气候变化事实与影响
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作者单位: Center for Weather Forecast and Climate Studies (CPTEC), National Institute for Space Research (INPE), São José dos Campos, São Paulo, Brazil; Earth Observation General Coordination (OBT), National Institute for Space Research (INPE), São José dos Campos, São Paulo, Brazil; Department of Meteorology, University of Reading, Reading, Berkshire, United Kingdom; Agricultural Engineering Department, Federal University of Viçosa, Viçosa, Minas Gerais, Brazil
Recommended Citation:
Parise C.K.,Pezzi L.P.,Hodges K.I.,et al. The influence of sea ice dynamics on the climate sensitivity and memory to increased antarctic sea ice[J]. Journal of Climate,2015-01-01,28(24)